I will go for Gold because I may want to match it with a gold watch
I'm Asian so I need that lucky gold!!!
I have a gold 5S and I'm going with space gray.
That's what I did, too.
Had I seen the colours in person before ordering, I may have chosen differently and stayed with gold; the gold on my fianceé's new 6 looks amazing - it's a warmer, more yellow tone than on my old 5S - more akin to protocol droid gold
The 6 in space grey is sleek and futuristic though - I like it a lot, although no where near as cool as the original slate & black iPhone 5 that was stealth-like
Space grey for me, although really wished they'd offer a black..
Well, it's an entirely personal choice, but I feel like the Space Gray looks sleek.
Also, I hate the way you get a big black rectangle on a white screen when the phone is off. When you true off the black model it just looks like a solid black slate.
I don't know though. I feel like the white just looks cleaner. It's certainly less of a fingerprint magnet.